Linux dynamic linkers "ld.so" and "ld-linux.so" buffer overflow
| dynamic-linkers-bo (7219) |  High Risk |
Description:
The 'ld.so' and 'ld-linux.so' dynamic linkers in some Linux distributions are vulnerable to a buffer overflow when reporting errors. By forcing an error while calling a dynamically linked setuid program with a long program name (argv[0]), a local attacker can overflow a buffer and execute arbitrary code on the system. An attacker can use this vulnerability to gain root privileges on the system.
Platforms Affected:
- Linux, Kernel
- SCO, Caldera OpenLinux 1.1
Remedy:
For ld.so/ld-linux.so versions prior to 1.9.5:
Upgrade to the latest version of ld.so/ld-linux.so (1.9.5 or later), as listed in BugTraq Mailing List posting dated Feb 4 1998 10:20AM. See References.
For Caldera OpenLinux 1.1:
Upgrade to the latest ld.so package (1.7.14-5 or later) as listed in Caldera Systems, Inc. Security Advisory SA-1997.11. See References.
— OR —
Apply the patch for this vulnerability, as listed in KSR[T] Advisory #2.
Consequences:
Gain Privileges
References:
- BugTraq Mailing List, Tue, 22 Jul 1997 08:47:43 -0500, ld.so vulnerability at http://archives.neohapsis.com/archives/bugtraq/1997_3/0120.html.
- BugTraq Mailing List, Wed, 4 Feb 1998 17:20:39 +0100, An old ld-linux.so hole at http://archives.neohapsis.com/archives/bugtraq/1998_1/0158.html.
- Caldera International, Inc. Security Advisory SA-1997.11, Vulnerability in ld.so at ftp://ftp.caldera.com/pub/security/OpenLinux/SA-1997.11.txt.
- KSR[T] Advisory #2, ld.so at http://marc.theaimsgroup.com/?l=bugtraq&m=87602661419318&w=2.
- CVE-1999-1182: Buffer overflow in run-time linkers (1) ld.so or (2) ld-linux.so for Linux systems allows local users to gain privileges by calling a setuid program with a long program name (argv[0]) and forcing ld.so/ld-linux.so to report an error.
Reported:
Jul 17, 1997
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